Using a suspension system in a hard hat helps ensure what aspect?

A suspension system in a hard hat is primarily designed to enhance comfort and fit for the wearer. This system typically consists of adjustable straps or a cradle that holds the hard hat securely on the head while also providing padding and ventilation. This allows for a better distribution of weight and minimizes pressure points, making the hard hat more comfortable to wear for extended periods.

While other features such as warmth, visibility, and noise reduction can be beneficial in different contexts, they are not the primary function of a hard hat's suspension system. The main goal of the suspension system is to ensure that the hard hat sits correctly and securely on the head, providing maximum protection without sacrificing comfort.